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A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 16.0 m/s. The student throws a ball along a path that she judges to make an initial angle of 54.0° with the horizontal and to be in line with the track. The student's professor, who is standing on the ground nearby, observes the ball to rise straight up. How high does the ball rise?
todays terrestrial background radiation is about 50 mremyear mainly due to the uranium and thorium decay chains and
To start a great night of doing physics homework, you sit down to pour yourself a good cup of coffee. What is the final temperature of coffee and mug once they come to thermal equilibrium
A string trimmer is a tool for cutting grass and weeds; it utilizes a length of nylon "string" that rotates about an axis perpendicular to one end of the string. What is the length of the rotating string
A painter is standing on scaffolding that is raised at constant speed. As he travels upward, he accidentally nudges a paint can off the scaffolding and it falls a distance 15.4m to the ground. find the speed of the can just before it hits the groun..
the electric field just above the surface of the charged drum of a photocopying machine has a magnitude e of 2.3 times
An object is placed to the left of a convex lens and on the optical axis. find the magnification of the image formed by the lense
a hollow copper wire with an inner diameter of 1.1 mm and an outer diameter of 1.8 mm carries a current of 15 a. what
A point charge is held at the center of a conducting spherical shell, whose inner and outer radii are 3.0m and 5.0 m, respectively. What is the net charge on the shell
One end of a brass bar is maintained at 305 oC, while the other end is kept at a constant, but lower, temperature. What is the temperature of the bar at a point 0.129 m from the hot end
two sources source a and source b are emitting the same frequency f with the same amplitude a but are out of phase from
A hollow spherical shell with mass 1.80kg rolls without slipping down a slope that makes an angle of 40.0? with the horizontal. Find the magnitude of the frictional force acting on the spherical shell
A ball rolls horizontally off the edge of a tabletop that is 1.40 m high. What was its speed at the instant it left the table
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